Paula on her way to setting a new world record for the marathon
Ninety per cent of the girls who entered Born To Win cited one woman as their sporting hero.
Her huge lungs let her consume vast amounts of oxygen.
Watch Paula's blueprint
Her heart, twice the size of an average female's pumps oxygen to her muscles packed with energy releasing cells.
So she can run very fast for a very long time.
Paula Radcliffe currently holds an amazing ten world records including the marathon over 26.2 miles.
She achieves this by training very hard.
She runs 150 miles every week.